Musschenbroek, Petrus van, Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae

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              <pb o="93" file="0107" n="107" rhead="DE MAGNETE."/>
            attrahebatur, niſi in immediato contactu: </s>
            <s xml:id="echoid-s2252" xml:space="preserve">adeo ut vis Magnetica fere
              <lb/>
            penitus in hoc reſiduo pulvere ſileat, quod ſequenti operatione
              <lb/>
            exploravi.</s>
            <s xml:id="echoid-s2253" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2254" xml:space="preserve">3. </s>
            <s xml:id="echoid-s2255" xml:space="preserve">Hunc pulverem in crucibulo commiſi Igni in furno Anemi per
              <lb/>
            horam unam, evaſit pulvis rubicundus, lætioris ruboris, quam
              <lb/>
            creta rubra eſſe ſolet; </s>
            <s xml:id="echoid-s2256" xml:space="preserve">hic oppoſitus Verſorio 6 pollicum, id nequa-
              <lb/>
            quam attraxit, aut movit, nec ullomodo â polo Magnetis for-
              <lb/>
            tiſſimi attractus, vel tantillum motus fuit.</s>
            <s xml:id="echoid-s2257" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2258" xml:space="preserve">Hæc igitur fuit Terra iners Magnetis, in qua nulla virtus ſuper-
              <lb/>
            ſtes erat; </s>
            <s xml:id="echoid-s2259" xml:space="preserve">hanc Spiritus Nitri proinde non ſolvit, ſed modo illud
              <lb/>
            ex Magnete elicit, quod virtutem habet.</s>
            <s xml:id="echoid-s2260" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2261" xml:space="preserve">4. </s>
            <s xml:id="echoid-s2262" xml:space="preserve">Idcirco Tincturam exſiccavi, quæ præbuit plurimum ſubſtan-
              <lb/>
            tiæ rubræ inſtar Colcotar vitrioli: </s>
            <s xml:id="echoid-s2263" xml:space="preserve">hæc in pulverem redacta non
              <lb/>
            attrahebatur a Magnete, quod mirabar primum, opinatus vim Ma-
              <lb/>
            gneticam penitus eſſe in hac operatione deſtructam; </s>
            <s xml:id="echoid-s2264" xml:space="preserve">ſed judicium
              <lb/>
            ſuſpendebam detegens ex ſapore, pulverem abundare Sale acido in
              <lb/>
            evaporatione relicto & </s>
            <s xml:id="echoid-s2265" xml:space="preserve">qui eaſdem fabulas cum reliquis Salibus agere
              <lb/>
            poſſet: </s>
            <s xml:id="echoid-s2266" xml:space="preserve">idcirco pulverem in crucibulo expoſui igni fortiſſimo rever-
              <lb/>
            berii per bihorium, & </s>
            <s xml:id="echoid-s2267" xml:space="preserve">recepi pulverem, copiâ vix imminutum, co-
              <lb/>
            loris fulvi, inſipidum, qui vehementiſſime â Magnete attrahebatur,
              <lb/>
            fere tam fortiter, quam limatura Ferri, quæ fortius â Magnete attra-
              <lb/>
            hitur, quam Magnes in pulverem minutus: </s>
            <s xml:id="echoid-s2268" xml:space="preserve">Vere igitur dixerim me
              <lb/>
            hoc modo ſeparaſſe ex Magnete partem aliquam intertem ex eâ, quæ
              <lb/>
            virtute pollet; </s>
            <s xml:id="echoid-s2269" xml:space="preserve">ſed hæc pars non niſi mera eſſe terra videbatur, quam
              <lb/>
            aliis viis forte immutare, forte non poſſem; </s>
            <s xml:id="echoid-s2270" xml:space="preserve">Sublimavi eam
              <lb/>
            quidem cum Sale Ammonico, qui penitus volatilis eſt factus ipſa
              <lb/>
            manente fixa, & </s>
            <s xml:id="echoid-s2271" xml:space="preserve">coloris multo obſcurioris, quam antea fuerat, Sal
              <lb/>
            nihil ex ipſa reddidit volatile: </s>
            <s xml:id="echoid-s2272" xml:space="preserve">poſtea materiam Magneticam lavi atque
              <lb/>
            edulcoravi aqua, ut ſi quid Salis a prioribus operationibus relictum
              <lb/>
            fuiſſet, id omne omnino tolleretur, pulvis exſiccatus colorem re-
              <lb/>
            ferebat obſcurum, qui a Magnete in initio parum attrahebatur,
              <lb/>
            ſed qui cum ſemel vim Magnetis leniter ſupraducti ſubolfecerat,
              <lb/>
            vehementiſſime omnium pulverum attractus fuit, atque ad notabi-
              <lb/>
            lem a Magnete diſtantiam elevabatur: </s>
            <s xml:id="echoid-s2273" xml:space="preserve">Si hujus examini plus incum-
              <lb/>
            beremus, forſitan aliquid, quod labores penſaret, invenerimus;
              <lb/>
            </s>
            <s xml:id="echoid-s2274" xml:space="preserve">nunquam enim ars Analytica ingrata fuit cultoribus, ſed </s>
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